E-Cigarettes: Expert Q&A With the CDC
Q: Any new research on the effects of e-cigarettes?
A: I am not aware of any. It would be extremely difficult to do currently because ... in terms of long-term health effects, it takes decades to look at the effects we’re talking about. At one level we’re trying to get the question into the great national surveys so we’ll be able to make sense of this 10, 20 years from now. We have to rely on what we know of toxicology, that what comes out of e-cigarettes is less toxic, but it’s more toxic than breathing clean air. That’s our preferred modality for breathing.